Dynamo-electric machine.



E. M. TINGLEY.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED NOV. 13. 1905.

945,425. Patented Jan. 4, 1910.

' WITNESSES:

INVENTOR alflzuw Q *4* 7/r I 0L S ATTORNEY TED STATES PATENT OFFICE.

" EGIBERT M. TINGLEY, or PITTSBURG, PENNSYLVANIA, ASSIGNOR 'ro'wns'rmenoosn ELECTRIC & MANUFACTURING COMPANY, A CORPORATION OF PENNSYLVANIA.

DYNAMIC-ELECTRIC MACHINE.

' To all whom it may concern:

Be it known that 'I, Eennlrr M. TINGLEY, a citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State-of Pennsylvania, have invented a new and useful Improvement in Dynamo -ElectricMachines, of which the following is a specification.

My invention relates to rotatable members of dynamo-electric machines,-and has special reference to rotatable field magnets which are adapted for operation at relatively high speeds.

The object of my invention is to provide suitable means for rotatably supporting a member of the class above specified, which shall be simple and effective, without interfering with such distribution of-the field magnet winding as will provide a minimum magnetic leakage and which shall permit of a materially reduced outside diameter of the magnetizable core.

Rotatingfield magnets, as heretofore const ructed'for operation by steam turbines or similar-high speed engines, have been pro-.

vided with a relatively small number of poles, generally two or four, and have usually comprised substantially cylindrical cores of magnetizable vmaterial which surrounded the shafts by which they were driven.

In order to adequately resist the strains to which the above mentioned members weresubjected in operation, their shafts were made of large diameter, and their cores were correspondin ly reduced in thickness. Such reduction 0? core dimensions served to weaken the structure mechanlcally; to lessen l the availablespace for windings and to reduce the amount of material available for magnetic induction. -This was especially Y true in bi-polar machines in which the field magnet'windings completely encircled the core and were usually disposed in parallel, longitudinalplanes.

A material reduction in the diameter of the rotatable member for a given size of machine may be effected byrny invention, in

which the encircling-slots for the field ma net winding'are centrally grouped in para lel, lon itudinal planesysuitable supporting means eing provided by a pair of similar end couplings which are attached to the ends Specification of' Letter-s Iatent.

of the core portion near its outer cylindrical surface and which support shaft sections the axes of rotation of which coincide with that of the core portion. A further advantage of this construction resides in the fact that the field magnet winding may beplaced in position in the core slots before the shaft members or end couplings are attached thereto,

Patented Jan. 4, 1910; Application filed November 13, 1905. Serial No. 287,057.

so that the labor involved is materially reduced.

The single figure of the accompanying drawing is a longitudinal section of a portion of therotatable member of a dynamoelectric machine that is constructed in accordance with my invention.

Referring to the drawing, a magnetizable' and substantially cylindrical core portion 1 is provided with a plurality of encircling slots 2 that are disposed in parallel, longitudinal planes and in which a field magnet winding 3 is located. A pair of similar flanged sleevecouplings 4 and 5 are attached to the core member 1 by a plurality of bolts 6 and serve to support similarshaft sections .7 and 8, which are so rigidly fixed thereto that their axes of rotation arecoincident with that of the core member. By this means the necessity for providing a hole through the center of the core of sufficient diameter to receive the shaft is obviated, and the couplings 4 and 5 may preferably be constructed of non-magnetizable material, such as bronze, thereby minimizing the magnetic leakage from the core.

The coupling .tis provided with collector rings9 and 10, which are insulated therefrom and from each other by an insulating bushing 11 and are connected to the field winding 3 by means of insulated leads'which are disposed in suitable grooves 12 in the shaft portion 7. y The connections between the winding conductors and the leads are accessible through openings 13, in the coupling 4, that are provided with insulating wedges and are closed by cap screws 14.

v Spacing blocks 15 of relatively soft material are preferably interposed between ends of the shaft sections and the core body and air-propelling vanes 16 may advantageously be mounted upon the coupling for the purpose of ventilation.

The shaft sections 7 and 8 may be integral with the couplings 4 and 5, if desired, and I' desire that variations in size, form and arresults shall be included within the scope of my invention. I

I claim as my invention:

1. A rotatable member for dynamo-electric machines, comprising a magnetizable core having an embedded winding, flanged coupling sleeves clamped to the ends of the core, shaft sections the inner ends of which are seated in said coupling sleeves, and blocks interposed between the ends of the shaft sections and the core.

2. A rotatable member for dynamo -electric machines, comprising a magnetizable core having an embedded winding, flanged, coupling sleeves clamped to the ends of the core, shaft sections the inner ends of which are seated in said coupling sleeves, and soft metal-blocks interposed between the ends of .the shaft sections and the core. rangement of details which obtain similar 3. A rotatable member for dynamo-electrio machines, comprising a magnetizable core having a magnetizing winding dis posed in centrally located parallel and longitudinal planes, flanged coupling sleeves of nonmagnetizable material clamped to the ends of the core, shaft sections the inner ends of which are seated in said coupling sleeves, and soft metal blocks interposed between the ends of the shaft sections and the core.

In testimony whereof, I have hereunto subscribed my name this 8th day of November, 1905.

YEGBERT TINGLEY.

Witnesses:

H. S. DE LANCIE, BIRNEY' HINEs. 

